Self-reversing check-valve



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' Jersey,

y UNITED STATES PATENT OFFICE..

VJOHN s. con, or PATERsoN, NEw JERSEY.

'sELF-REvr-:Rsmc cH EcK-VALVE.

SPECIFICATION forming part of Letters Patent No. 578,481, dated March 9,1897. i Application filed September 2, 1896. Serial No. 604,606. (Nomodel.)

To a/ZZ whom, t nuu/ concern:

Be it known that I, JOHN S. COE, of Paterson, in the county of Passaicand State of New have invented a new and Improved Self-ReversingCheck-Valve, of which the following is a specification.

The object. of this invention is to provide a valve for the purpose ofeffecting automatically the opening and closing of a passage or conduitin such manner that the said passage or conduit may be open to thepassage or flow of water or other iiuid through it in either of twodirections while it is closed to or checks such passage or flow in theother direction.

Figures'l and 2 represent in central vertical section au automaticallyself-reversing valve embodying my invention, Fig. l representing thevalve Aas open to the flow of the iiuid in a downward direction, andFig. 2 representing the valve as open to the flow in an l upwarddirection. Fig. 3 represents avertical section of a Water-heatingapparatus or boiler illustrating a practical application of myinvention.

Similar letters of reference designate corresponding parts in all thefigures.

Referring rst to Figs. l and 2, -A B designate a casing made of twoparts A and B,

separable for the introduction of the valve C. This separability may beprovided for in any suitable manner, but it is shown as provided for byscrew-threading the parts and screwing them together, as indicated atct. The said casing is open at the top and bottom. The valve C, whichhas the general form ofa puppet-valve, but is hollow throughout and sohas a passage directly through it, consists of a central tube or hollowstem b, of the upper part of The said stemb is fitted but to workfreely, in a central bore lower part of the valve-casing, the

which is a flange c. closely, d in the upper end of which casing formsan annular valve-seat e for the flange c of the valve. In this seat ethere are openings f, leading through the sides of the part B of thecasing. Across the upper part A of the casing there is provided astationary bar or plate g, the lower face of which serves as a seat forthe upper end or crown of the valve, the two valveseats thus facing eachother. The seat thus constituted by the said bar or plate gis wideenough to cover and close the passage through the hollow valve-stem, asshown in Fig. 2, butit has on opposite-sides of it a free passage, asshown at h in Figs. l and 2, for the flow. or circulation of the wateror other fluid. The flange c of the valve is sufficiently smallerexternally than the interior of the part A of the valve-casing for thefree iiow of water around the said flange.

'Ihe operation of this valve is as follows: If the pressure above thevalve is sufficiently greater than that below it to raise the valve, theflange c is thereby held to the seat e, as shown in Fig. l, and theopenings ff in the said seat are closed, but a free downward passage isprovided through` the passages h at the sides of the seat g and throughthe hollow stem b of the valve C, as indicated by the arrows shown insaid figure. If the pressure is greater below than above the valve, thesaid pressure acting through the openings f in the valve-seat e againstthe bottom of the flange c of the valve and also through the bore dagainst the bottom of the valve-stem forces the valve upward against theseat g, as shown in Fig. 2, and a free upward pressure is pro- -videdthrough the openings f around the flange of the valve and at the sidesof the seat g, as indicated by the arrows 4in that figure.

The water-heating apparatus illustrated in Fig. 3 to represent apractical application of my invention is the subject of my United StatesPatent No. 55,675,dated March 3, 1896. In this apparatus D designates atank constituting the body of a boiler such as is employed for heatingwater for domestic use and is always intended to be kept iilled withwater by hydraulic pressure. E is aheatingchamber to be heated by anyconvenient means, and F is a water-heating coil within the said chamber.The water is introduced into the boiler through a pipe G and drawn offthrough a pipe H. A n automatic valve I is placed between thesupply-pipe G and a box J, through which the water is admitted from thetank D to the heating-coil F. The upper end of the coil communicates bya pipe K with the upper part of the tank. At all f times but whenwateris being drawn offthe circulation is intended tobe from the tank. Dthrough the box J into the heating-coil, up-

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ward through said coil, and thence tlrough the pipe K to the top of thetank D, thence downward into the latter; but when water is drawn fromthe boiler by the pipe H the circulation through the pipe K and coil isreversed, the valve I being caused by the draft of the water to rise toits seat i at the entrance to the boxJ and so cut off the lower end ofthe coil from the tank, the water then flowing from the tank through thepipe K and downward through the coil to the box J and pipe H and freshwater entering the tank through the pipe G. lVhen the pipe K terminatesat the top of the tank and there is no valve at the connection of thesaid pipe with the tank, the circulation upward through the coil to thetank is sometimes seriously obstructed by the resistance of the colderwater in the tank to the descent into it of the hotter Water from thecoil, but by placing the valve which I have hereinabove described asmyinvention at the connection of the pipe K with the tank and 4attaching to the bottom of the valve-casing a pipe L, projectingdownward into the tank, so as to deliver the hotter water from the coilinto the lower part of the latter, the said hotter water will issuefreely from the said pipe L, owing to its tendency to rise through thecolder water in the said tank.

It will be understood from the description which I have given of thevalve itself that it provides for the circulation of the water throughthe coil in either direction and at the same time checks or prevents itsflow in the other direction.

What I claim as my invention isl. The combination of a valve-casinghaving in it two opposite valve-seats, and a puppetvalve which has anopening directly through it, the flange of the said valve seatingagainst one of said seats to check the flow through the valve-casing inone direction only and the crown of the said valve seating against theother of said seats to check the flow in the other direction only,substantially as herein described. Y

2. The combination with 4 a valve-casing containing two oppositevalve-seats one of which is annular with central and side openings andthe other of which is arranged transversely to the casing but haspassages at its sides, of a hollow puppet-valve which has a passagedirectly through it, the stein of said valve fitting the central openingin said annular seat and the iange of said valve seating against saidannular seat for controlling the side openings therein, andthe crown ofthe said valve seating against said transversely-arranged seat forclosing the passage through the valve itself, substantially as hereindescribed.

JOHN S. COE.

Witnesses:

FREDK. I-IAYNEs, LIDA M. EGBERT.

